millee



L. H. MILLER.

SAFE.

Patented'Dec; 11, 1866.

THE NORRIS PzTens co. FNOTO LITHOu WASHINGTON, u. c,

than 1 @fm 'IMPROVEM'EN T IN SAFES.

, H. MILLER, 0r BALTIMORE, MARYLAND. ,EetterszPatent No. 0,405, date 1360mm 11, 1866.

itt: s unt mm): in in tight limiters iaatmtzmt mating nnrt nfflgs same.

1 TOALL WHOM IT MAY CONCERN: i Be it linown that LL. H. MILLER, of the city and countyof Baltimore, and State of Maryland,-have invented a new and improved mode of constructing Safe Frames; and I do hereby declare that the following i is afull, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification-fin which- Y I Figure 1 is a perspective view of a safe, showing a portion of one side broken away to exhibit the construction thereof.

Figures 2 and 3 are enlarged views of a portion of a safe frame, constructed after my. invention. Similar letters of reference indicate corresponding. parts in the three figuresl 4 i This invention relates to an improrementin the construction of burglar-proof safes, fire and burglar-proof safes-also vaults and-vault-doors,my object being .to prevent thieves from drilling holes through the walls of the safes, and also from gaining access to the interior of asafe by breaking and removing the brittle-or drillproef metal,'as will be hereinafter described.

i To enable others skilled in the art' to understand my invention, I will describe its construction "and operation. i

y invention consists ,s q ngihe.uallsp a e ofntwo or moxesheets of wrought m n; say .boiler iron, of a suitable thickness, to which plates a number of studs, knobs, or suitable projections are secured, and between these plates thus studded cast metal is poured, which, when cool, will form a union of the wrought plates, and make a solid wall. The drawings represent three plates, A A A, of wrought metal, forming part of a single wall; but for some purposes, a greater or less number of wrought plates may be required The inside surfaces of the plates A A A are thickly studded with screws, 9 a, or projections of any suitable-form, which may be tapped into thefplates A A, but not to project through them, The length of these studs a maybe less thanthe width of the spaces which it is desired to leave between the wrought metal plates, or, if desired, they may be equal in length to the width of such spaces. I prefer to leave spacesbetween the inner ends of the studs and the pTates opposite to them, for reasons which will behereinafter explained. The intermediate plate Ahas thestuds a a applied to both its sides, as shown in fig. 2. The outer plates A A-ha ve the studs applied only t0 their inside surfaces. The .only order which it is necessary to observe in applying the studs a a toltheir respective plates, is to have them so arranged that, when the plates are brought together, jsaid studs shalln'ot coincidewith each other, or, inother words, no stud will be in a linewith another stud. The studded plate's 'A A A are-arranged at suitable distances apart, and confined in this pbsition, -.when the spaces between them are filled by pouring in melted nietal, which is indicated by letters 0. I propose- .to employ for the inner walls CC, Franklinite, or other suitable cast metal, which will be'sufliciently hard to resistjtlrp action of drills or otherinetal tools; This metal will entirely fill up the spaces between the plates A A A, surrounding the studs a a, and when'cool the studs will be firmly imbedded in it, thus forming a solid wall, composed of alternate layers of soft and brittle metal, united together by secret studs or anchors. -It wilTbe seen'froin the above description oi' rny invention, that I employ soft or wrought metal outside,.and east 'or brittle metal inside, in forming the walls and I unite these plates togetherin such manner that the wrought metal will effectually prevent the hardened metal from being shattered, and any access being-had to "r the interior of .the safe in this manner The hardened metal will prevent thesafe-wall from "being penetrated by drilling or other means; even should the drill penetrate one of the soft metal studs-a, itwould come in Q contactu-ith' the hardened metalbefore reaching the intermediate plate A, as the studs do not abut against this late.

' aninwnrc that cast metal has been poured in between'm'ought metalplates; .butin one instance where this has been (loiie,the wrought metal studs which are employed as a means of incchanically'uniting the'wrought and cast metals have had their ends exposed on the-outside side of the safe, and thus a facility Tor separating i the di'il'orent metals of which'the safe is composed isaffoided to the burglar; for, with the ingenious implements which burglars employ, these studs can be cut away so as to destroy their effcct'of holding the metals together.

'I also am aware that, iu another instance, wrought and cast metals have been disposed in the. order in whichI x l P P to P them; u ii! t 5 he Wrought'metal studs or bolts have been employer], but the ti'es or interlocking studs have been formed of the brittle hard cast metal; and therefore the burglar is also afforded a facility for separating the metals, it being a comparatively easy matter for him to break off, with a hammer, the interlocking studs or fastenings. I also am aware that studs or ho oks which do not tie the wrought metal'plates together, have been imbedded into plaster of Paris or other fire-proof material; but in this instance the intermediate material of the safe is not a drill-proof substance, and therefore is unlike my invention, both in construction and result.

' What I claim as my invntiom'and desire to secure by Letters Patent, is-

1. A burglar-proof wall for safes and other similar purposes, of wrought andcast metal, made and held together by secret studs a a, all constructed substantially as described.'

2. The studs 11 a, projecting from the innersurfaces of one of the wrought metal plates, but not extending to the inner surface of a contiguous plate, in combination witha cast metal filling between said plate, substantially as described.

L. H. MILLER.

Witncsses:

ALLEN E. Fonnns'rnn, WM. D. MILLER, Jr. 

